The gas station release device processes the car head filled with compressed gas pry the car pull to the gas station, unloading gas stage high-pressure hose connected with CNG pry through the high pressure piping natural gas into the release device. Natural gas into the release device, the first through the filter, and then through a heat exchanger for heating, gas heated by a regulator to the pressure raised to 1.6MPa, and then into the secondary regulator, the pressure is regulated the required pressure. In the process of heat transfer, pressure regulator, with a low gas temperature protection, and an outlet pressure of the overpressure protection (overpressure cut off and safety relief), the release of the overpressure protection device export pressure (overpressure cut off and safety relief). Compressed natural gas by the release device regulator, and then the measurement and processing smelly, into the pipe network.